“Under the Pentastar” is a weekly recap of some of the major stories at Chrysler Group LLC. This week’s edition includes SRT showing off the 2013 SRT-8 Core Performance models at the 2013 Chicago Auto Show, the Ram Truck Brand is the most improved brand in the J.D. Power and Associates 2013 Vehicle Dependability Study, and Chrysler Group dealers meet at the National Automotive Dealers Association in Orlando, Florida.